坡面径流与产沙量影响因素分析——以甘肃省定西安家沟流域为例

doi:10.16232/j.cnki.1001-4179.2018.03.007

摘要/Abstract

摘要： 以黄土丘陵沟壑区安家沟流域坡沟系统作为研究对象，采用多元线性回归与单因素方差分析了植被类型、坡度、降水平均强度、降水历时等因子对径流量与产沙量的影响。结果表明：不同植被类型条件下坡面径流量、产沙量的组间F检验值分别为3.873，3.930，均在0.05水平下差异显著；不同坡度的坡面径流量与产沙量的F检验值均大于1，径流量与产沙量均值存在差异；不同植被类型条件下径流量与产沙量的泊松相关系数R值均高于0.6（Sig.=0.00），二者存在显著相关关系，产沙量随径流量的增加而增加；不同植被类型下各影响因子与产沙量多元回归拟合度的R2均较高，说明各类因素可以较好地解释产沙量的变化，尤其天然草地相关性最大，R2值达到0.95并在0.05水平下显著。研究结果为黄土高原水土流失治理提供了一定理论参考。

关键词: 径流量, 产沙量, 植被类型, 黄土丘陵沟壑区, 安家沟流域

Abstract: Taking Anjiagou river basin in the loess hilly-gully region as a case subject, and by using multiple linear regression and one-way ANOVA, multiple variables including vegetation, slope gradient, mean precipitation intensity, precipitation duration that have influence on slope runoff and sediment yield are analyzed. The results show that: ①with different vegetation types, F-value of interclass variance between slope runoff and sediment yield are 3.873 and 3.930, which is statistically significant under 5% significance level; with different slope gradients, their F-values are greater than 1, revealing un-corresponding relation between slope runoff and sediment yield; ②square of correlation coefficient (R2) between runoff and sediment yield are greater than 0.6 (Sig.=0.00) with various vegetation types, showing that the two variables are highly correlated, sediment yield increase with the increase in the slope runoff; high R2 indicates that the change in the sediment yield can be well explained by the multiple linear regression model. Natural grassland is highly correlated with the change in sediment yield with the R2 equals to 0.95, and is significant under 5% significance level.

Key words: runoff, sediment yield, vegetation types, loess hilly-gully region, Anjiagou river basin

曲富荣. 坡面径流与产沙量影响因素分析——以甘肃省定西安家沟流域为例[J]. 人民长江, doi: 10.16232/j.cnki.1001-4179.2018.03.007.

QU Furong. Analysis on influential factors of slope runoff and sediment yield: case of Anjiagou river basin in Dingxi, Gansu Province[J]. , doi: 10.16232/j.cnki.1001-4179.2018.03.007.

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坡面径流与产沙量影响因素分析——以甘肃省定西安家沟流域为例

Analysis on influential factors of slope runoff and sediment yield: case of Anjiagou river basin in Dingxi, Gansu Province

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